/Engine/Plugins/Runtime/GameplayAbilities/Source/GameplayAbilities/Public/AbilitySystemComponent.h
Disable or Enable a local user from being able to activate abilities. This should only be used for input/UI etc related inhibition. Do not use for game mechanics.
[UFUNCTION](Programming/UnrealArchitecture/Reference/Functions)(BlueprintCallable, Category="Abilities") virtual void SetUserAbilityActivationInhibited ( bool NewInhibit )